Retrospective study of endodontic treatment performed by undergraduate students using reciprocating instrumentation and single-cone obturation.

Objectives: The aim of this cross-sectional retrospective study was to evaluate radiographically the technical quality of root canal treatment performed by undergraduate students using reciprocating NiTi instrumentation and single-cone obturation.

Methods: Endodontic treatment on 1102 teeth performed by undergraduate students from the School of Dentistry of the University of Santa Cecilia (Brazil) was evaluated. All root canal preparations were performed using Reciproc files and were irrigated with 1% NaOCl.

Micro-CT Evaluation of Gutta-Percha Removal by Two Retreatment Systems.

Introduction: The aim of the present research was to compare the remaining filling material and the volumes of dentine removed after retreatment of curved canals with two rotary systems naming ProTaper Universal Retreatment and Mani NRT-GPR using micro-computed tomography (micro-CT).

Methods And Material: Forty mandibular molars containing two completely separated canals, with curvature angle of 25-35 and a curvature radius <10 mm were prepared to the Mtwo instrument 35/0.04 and filled with warm gutta-percha and AH-Plus sealer.